Apple has today made their 'Apple Events' channel accessible again from any Apple TV (2nd or 3rd generation), ahead of next week's WWDC 2015 keynote. The Apple Events channel confirms that the keynote will be live-streamed on Monday, June 8 at 10am, San Fancisco time.
For developers who want to follow along with the other WWDC sessions, Apple previously announced that 'select' WWDC 2015 sessions will be live streamed on the WWDC website and in the WWDC app. For those technical sessions that are not live streamed, Apple has said that they will be made available to stream and download at the end of each day.
In the meantime, the channel also allows users to stream past Apple events (including WWDC 2014), just in case you've got some free time over the next week. For those without an Apple TV, in the past Apple (for other live streamed events) also hosted a live stream on their website, but that will probably go live closer to next Monday.